A change in store at sea? (6)

I believe the answer is:

afloat

'at sea?' is the definition.
(similar in meaning)

'a change in store' is the wordplay.
'change in store' becomes 'float' (change in a shop's till when trading begins).
'a'+'float'='AFLOAT'

(Other definitions for afloat that I've seen before include "Resting on water" , "On board at sea, on ship" , "Still solvent" , "Buoyant: solvent" , "Borne on the water" .)

I've seen this clue in The Telegraph and The Times.

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